Frost dates in Princeton, IL
The average last spring frost in Princeton is around April 16 and the first fall frost is around October 17. That gives Princeton an average growing season of about 184 days.
Last spring frost
| Early (10% chance after) | April 3 |
|---|---|
| Average (50%) | April 16 |
| Late (90%) | May 2 |
First fall frost
| Early (10%) | October 7 |
|---|---|
| Average (50%) | October 17 |
| Late (90% chance before) | October 31 |